Mounting for gun sights



A ril 15,1958 J. F. 'DAHLBERG 2,8 0,

MOUNTING FOR GUN SIGHTS Filed Nov. 9, 1956 2 Sheets-Sheet 2 0A 2.. ,1, 37 IN VEN TOR.

35 .35 Jogas Folki Dahl berg ditorrgg United tates Patent 6 MOUNTING FOR GUN SIGHTS Jonas Folke Dahlberg, Vancouver, British Columbia, Canada Application November 9, 1956, Serial No. 621,373

9 Claims. (Cl. 33-50) This invention relates to gun sights, and more particularly to a mounting for telescopic sights adapted for use on rifles, shotguns and other similar small arms. An example of the general type of sight and mounting therefor to which the present invention relates, will be found in my co-pending application for patent Serial No. 425,963, filed April 27, 1954, now Patent No. 2,783,539.

It is one of the objects of the present invention to provide a telescopic sight mounting which can be easily mounted on the gun; which will be composed of a minimum of parts, and by means of which elevating and lateral adjustments of the sight are easily and accurately secured, to thereby obtain exceptional accuracy in shootmg.

It is an object of the invention to provide a mounting for telescopic sights which can be described as being of one-piece construction, resulting in a sturdy and strong unit as well as one of attractive appearance.

It is further object of the invention to provide a mounting means of relatively simple construction and which can be readliy attached to standard guns, and one having numerous advantages readily apparent to those skilled in this art.

With these, and other objects to be hereinafter set forth in view, I have devised the arrangement of parts to be described and more particularly pointed out in the claims appended hereto.

In the accompanying drawings, wherein an illustrative embodiment of the invention is disclosed:

Fig. 1 is a side elevational view of the improved telescopic sight mounting, showing the same applied to a gun;

Fig. 2 is a view looking at the bottom or under side of the sight holder or housing;

Fig. 3 is a side elevational view of the holder or housing and one of the screws employed for holding it on the.

gun, with parts fragmentarily shown and in section to disclose construction;

Fig. 4 is a view looking at the forward end of the sight holder or housing, showing the screws employed for the securement of lateral adjustment of the sight;

Fig. 5 is a view looking at the rear end of the sight holder or housing, showing the screw used therein;

Fig. 6 is a side elevational view of the vertical adjustrnent plug;

Fig. 7 is a top plan view of the plug;

Fig. 8 is an enlarged sectional view, taken substantially on the line 88 of Fig. 1, looking in the direction of the arrows;

Fig. 9 is a side elevational view of the mounting saddle with parts in section to disclose construction;

Fig. 10 is an enlarged horizontal sectional View through the rear portion of the mounting;

Fig. 11 is a top plan view, with parts in section of the lock ring, and

Fig. 12 is a side elevational view of the lock nut.

In the drawing, 2 indicates a portion of a gun or rifle over which the telescopic sight mounting is fitted. Fitted 2,830,373 Patented Apr. 15, 1958 on the barrel 1 is a saddle 3 constituting a seat. The saddle or seat 3 is curved on its under surface, as indicated at 4, to enable the same to suitably conform to the curvature of the barrel 1, as shown in Fig. 8, and the seat or saddle 3 is centrally apertured as indicated at 5, to permit of the passage of a threaded stud 6 formed as a downward extension on a threaded plug 8. A threaded aperture is provided in the gun as indicated at 7 to threadably receive the stud 6. The plug is provided with a plurality of spaced grooves or notches 9 in its periphery, these grooves being equally spaced and they may be of substantial number and considerably more than shown in the drawing.

At 11 is shown the holder or housing for the telescopic sight 12. The holder is preferably composed of springy metal and is shaped to closely fit around the telescopic sight 12 between its ends. The holder or housing is provided with a relatively thick, integrally-formed bottom wall 13a provided near the forward end of the holder or housing with threaded openings 13 which receive screws 14 that thread into the barrel 1 and fasten the forward part of the housing in position thereon. Extending rearwardly from the forward end 15 of the holder or housing 11 is a pair of elongated slots indicated respectively at 16 and 17, which slots thus divide the bottom wall of the holder or housing into a central free portion 18 and side wings 19 and 20. The screw holes 13 are located in this central portion 18, as clearly seen in Fig. 2. The side walls 19 and 20 of the holder adjacent to the slots 16 and 17 are free at their lower edges and these side walls or wings of the holder are thus capable of adjustment by the two screws shown at 21 and 22 which thread into a hole 24 in the walls 19 and 20 and in the central part 18 of the holder. The manner in which these screws are employed to secure lateral adjustment of the sight will be presently described?'*"**"- Formed in the bottom wall 13a of the holder 11 near the rear end of the same is a threaded aperture 25 adapted to threadably receive the plug 8. The bottom wall 13a is provided with a central, elongated slot 26 extending forwardly from the rear end of the holder and having its forward end terminating adjacent to the inner ends of the slots 16 and 17, and located between these slots. The slot 26 is provided with a widened channel portion 27 which receives and retains a coil spring 27 resiliently operative against a ball 28 serving as a detent for engagement with any of the grooves or notches 9 in the plug 8. The spring 27 and ball 28 are held in position as shown in Fig. 10, by means of the clamping screw 29 extending transversely through an opening 29a in the bottom wall of the holder adjacent to the rear end thereof.

Adjustable on the plug 8 is an internally-threaded lock ring 30, constituting a lock nut and having a knurled periphery 31 and a frustro-conical top 32. Formed through the ring 30 are a plurality of equally-spaced, radially-extending apertures 33.

From the foregoing, the manner in which the mounting is fitted in position and adjusted will be readily understood. The saddle is fitted on the top of the barrel, and the stud 6 is extended through the central aperture 5 of the saddle and is threaded into the opening 7 in the barrel. The locking ring 30 is then threaded onto the plug 8. The holder 11 is threaded on the upper portion of the plug 8 by engagement of opening 25 therewith. The two front holding screws 14 are now threaded through holes 13 into the barrel. With the lens portion 40 of the telescopic sight removed, the sight 12 is pushed through the holder to the correct position therein and then the lens portion is replaced. The windage screws 21 and 22 are tightened slightly in the screw hole 24 just sufliciently to hold the front of the sight in position in the holder while the elevation adjustment is. made. To rotate the plug 8, by means of whiclLthis adjustment 18 secured, a pin such as shown at 41, and which in an emergency might be a toothpick, safety pin, nail or other slender object, is inserted through one of the holes 33 in the lock nut 30 to engage in one or the other of the grooves or notches 9 in the plug 8. By means of this arrangement, both the plug 8 and the lock nut 30 can be turned together as a unit to thereby raise or lower the rear end of the mount. The number of grooves 9 provided in the plug 8 can be numerous and suflicient to cause a clicking sound by ball 28 for every onequarter inch adjustment. When the proper elevation adjustment is secured, the rear transverse screw 29 is tightened, and the lock nut 30 is turned down against the top of the saddle 3 thereby maintaining the vertical ad justment. The lateral or windage adjustment is made by loosening one or the other of the screws 21 and 22 and tightening the other. By the arrangements described, an accurate vertical and lateral adjustment can be made, with a minimum of parts employed.

It will be noted that each of the screws 21 and 22 is provided with a double thread. That is to say, a thread is provided on the shank of each of these screws as well as on the head 50 thereof. The thread provided on the shank of each of these screws may be a relatively coarse thread, as for example, approximately thirty-two threads to the inch, while the thread on the head 50 of each of the screws may be a coarser thread, as for example, forty threads to the inch. These thread arrangements may be varied to meet different requirements. The hole 24, extending through the central free portion 18, as well as through the wings 19 and 20 is, of course, internally complementarily threaded in a manner to receive the screws. Through this double-thread arrangement an extremely fine windage adjustment is possible.

Having described a single embodiment of the inven tion, it is obvious that the same is not to be restricted thereto, but is broad enough to cover all structures coming within the scope of the annexed claims.

What I claim is:

1. A mounting for gun sights comprising, a gun barrel, a housing fitted around and embracing a telescopic sight, said housing being provided with an apertured integral bottom wall, mounting means at the rear of the housing consisting of a threaded plug screwed into the barrel and threadably engaged with a threaded aperture in the bottom wall of the housing, a saddle interposed between the plug and the barrel, a locking ring adjustable on the plug, means by which the ring and plug can be simultaneously engaged to turn both of them as a unit, clamping means in the bottom of the housing, said clamping means being located rearwardly of the plug, the bottom wall of the housing being inwardly split from its forward end, to thereby divide the bottom of the housing in said forward end into a central portion and side wings, and lateral-adjustment screws extending through said side wings and threadable into the central forward portion of the bottom wall.

2. In a mounting for telescopic gun sights, a housing fitted around and embracing a telescopic sight, said housing having an integral bottom wall, screws extending through the forward end of said bottom wall for fastening the same to a gun barrel, the bottom wall being split inwardly from the forward end of the housing on spaced lines to thereby divide the bottom into a central portion and side wings, screws extending through said side wings and entering the central portion for the lateral adjustment of the sight, the housing having a threaded opening in its bottom near its rear end, the housing having its: bottom wall split inwardly from its rear end to said opening, a screw extending transversely of the housing through the rear split portion thereof and at the rear of the threaded opening, a saddle mounted on the gun barrel, a threaded plug entering the opening in the housing and threadably adjustable therein, said plug having a stud portion passing through an opening in the saddle and threaded into the gun barrel, and a locking ring adjustable on the plug between the bottom of the housing and the top of the saddle.

3. In a housing as provided for in claim 2, wherein the plug has its periphery provided with equally-spaced notches, a ball and spring in the bottom of the housing, the spring urging the ball against the periphery of the plug to cause a clicking sound on each engagement of the ball with one of the notches in the plug, a transverse screw in the bottom of the housing to the rear of the spring, the locking ring having a plurality of radial openings extending through it whereby an implement inserted through one or the other of said holes can be engaged with one or the other of the notches in the periphery of the plug.

4. A housing for telescopic sights having an integral bottom wall slotted inwardly from its front and rear ends, the bottom wall having a threaded aperture, a plug threadable in said aperture, a locking ring adjustable on the plug and provided with means by which the plug and it can be engaged and rotatively adjusted as a unit, a saddle below the locking ring, the plug having a stud portion extending through the saddle and threadably engaging the gun barrel.

5. A mounting for gun sights comprising, a saddle fitted above a gun barrel, a threaded plug having a stud portion freely passing through an aperture in the saddle and threaded into an aperture in the gun barrel, a threaded apertured locking ring received on the outside of the plug, a sight holder mounted above the plug, said holder having an integral bottom wall provided with an opening in which the threaded plug is threadably and adjustably received, said wall being slotted inwardly from its rear edge to said opening, the plug having a notched periphery, the locking ring having openings through which the notched periphery of the plug can be engaged to rotate the plug and clic ing means in the slotted rear portion of the o der for engage n I the notches in the plug.

6. A mounting for gun sights comprising, a saddle fitted above a gun barrel, a threaded plug having a lower stud portion extending through the saddle and threadably received in the barrel, a threaded locking ring threadable on the plug, the plug having a notched periphery, the locking ring having radial openings through it whereby a pointed element may be inserted through one or the other of said openings to engage with a notch in the plug to thereby enable the plug and locking ring to be threadably rotated together as a unit, a sight holder provided with an integral bottom wall formed with a threaded aperture to engage with the plug, the said bottom wall being inwardly split from its rear edge to said aperture, a screw extended through the split portion of the bottom wall at the rear of the plug-receiving aperture, and click-producing means interposed between said screw and the notched periphery of the plug.

7. A mounting for gun sights comprising, a saddle fitted above a gun barrel, a threaded plug having a lower threaded stud portion freely extending through an opening in the saddle and threadably received in an opening in the barrel, a threaded locking ring threadable on the outside of the plug, the plug having a notched periphery, the locking ring having radial openings through it whereby a pointed element may be inserted through one or the other of said openings to engage with any notch in the plug to thereby enable the plug and locking ring to be threadably rotated together as a unit, a sight holder provided with an integral bottom wall formed with a threaded aperture to engage with the plug and within which the plug may be adjusted, the said bottom wall being inwardly split from its rear edge to said aperture, a screw to the rear of the plug extended through the split portion of the bottom wall to the rear of the plugreceiving aperture, and l ic k-producing meansin the form of a ball and spring interposed;hetween,said screw and the notched periphery of the plug.

8. A mounting for gun sights comprising, a housing fitted around and embracing a telescopic sight, said housing being provided with an apertured integral bottom wall, mounting means at the rear of the housing consisting of a threaded plug screwed into the barrel and threadably engaged with a threaded aperture in the bottom wall of the housing, a saddle interposed between the plug and the barrel, a locking ring adjustable on the plug, means by which the ring and plug can be simultaneously engaged to turn both of them as a unit, clamping means in the bottom of the housing, said clamping means being located rearwardly of the plug, the bottom wall of the housing being inwardly split from its forward end to thereby divide the bottom of the housing in said forward end into a central portion and side wings, and lateral adjustment screws extending through said side wings and threadable into the central forward portion of the bottom wall, each of said screws having screw threads on its shank and on its head, the threads on the head being finer than those on the shank, and the central part of the bottom wall and the wings being complementarily threaded for the respective reception of the shanks and heads of the screws.

9. In a mounting for gun sights, a housing fitted around and embracing a telescopic sight, said housing having a bottom wall, and being inwardly split from its forward end to thereby divide the bottom wall into a central portion and side wings, and lateral adjustment screws extending through the side wings and threadable into the central portion of the bottom wall, each of the screws having a threaded shank as well as a threaded head, with the threads on the head being finer than those on the shank, and the central part of the bottom Wall and the wings being complementarily threaded for the respective reception of the shanks and heads of the screws.

References Cited in the file of this patent UNITED STATES PATENTS 737,677 Tansley Sept. 1, 1903 880,065 Brunello Feb. 25, 1904 2,193,302 Stith Mar. 12, 1940 2,279,681 Ilbery Apr. 14, 1942 2,395,409 Hughston Feb. 26, 1946 2,542,513 Hackett Feb. 20, 1951 

